the symbol is the book to kill a mockingbird to me is the old tree. The kids find the different objects in. I think that this is the symbol because alot of the story is about the old tree. If you think about it how many trees has a knot-whole in it where you find different objects all the time. i think that later in the story the knot-whole in the tree will mean more then just a knot-whole in the tree.
